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Air Loop Free Cooling

Hi, i'm simulating an Air-Water system with OpenStudio. Into the central air handling unit there is only one coil, for heating in winter and cooling in summer. The problem is that air temperature of all zones go down when change the season (from heating to cooling or from cooling to heating). Is there a way to stop cooling coil when outdoor air is enough cold for cooling (free cooling)?

Air Loop Free Cooling

Hi, i'm simulating an Air-Water system with OpenStudio. Into the central air handling unit there is only one coil, for heating in winter and cooling in summer. The problem is that air temperature of all zones go down when change the season (from heating to cooling or from cooling to heating). Is there a way to stop cooling coil when outdoor air is enough cold for cooling (free cooling)?